After years of cross-border technical research and environmental assessments, a regional infrastructure developer has officially tabled a landmark energy proposal with Puerto Rican authorities that could reshape the island’s long-term energy outlook. The Caribbean Transmission Development Company (CTDC), headquartered in the Dominican capital Santo Domingo, has submitted its full plan for the Hostos Project to Puerto Rico’s Public-Private Partnerships Authority, bringing the ambitious undersea transmission cable initiative one step closer to breaking ground.
At the core of the project is a high-capacity, high-voltage submarine cable that will physically connect the power grids of Puerto Rico and the Dominican Republic. The transmission infrastructure is engineered to carry as much as 700 megawatts of electricity across the Caribbean Sea, and the project also includes the construction of new dedicated power generation capacity that will exclusively serve Puerto Rico’s domestic energy demand.
CTDC officials note that the proposal comes after multiple years of collaborative technical, environmental and regulatory reviews conducted by stakeholders in both jurisdictions. The initiative is already in an advanced stage of pre-construction development, positioning it to move forward quickly once approvals are secured.
For Puerto Rico, which has long struggled with fragile grid infrastructure and frequent power outages exacerbated by extreme weather events, the interconnection project offers a path to meaningful energy system improvements. CTDC emphasizes that linking the island’s grid to the Dominican Republic will shore up Puerto Rico’s overall energy security by boosting grid stability, boosting operational resilience against disruptions, and adding much-needed flexibility to power management. Beyond reliability gains, the project is also poised to play a pivotal role in diversifying Puerto Rico’s energy mix and strengthening the territory’s ability to respond to unexpected outages and large-scale emergency events.